/ d / log(2) \\| /x\
|-----|---------||| /x\*cos|-|
\dxi_2\log(xi_2)//|xi_2=sin|-| \2/
\2/
-------------------------------------
2
$$\frac{\cos{\left(\frac{x}{2} \right)} \left. \frac{d}{d \xi_{2}} \frac{\log{\left(2 \right)}}{\log{\left(\xi_{2} \right)}} \right|_{\substack{ \xi_{2}=\sin{\left(\frac{x}{2} \right)} }}}{2}$$
2/x\ / 2 \
cos |-|*|1 + -----------|*log(2)
\2/ | / /x\\|
| log|sin|-|||
/ d / log(2) \\| /x\ \ \ \2///
- |-----|---------||| /x\*sin|-| + --------------------------------
\dxi_2\log(xi_2)//|xi_2=sin|-| \2/ 2/ /x\\ 2/x\
\2/ log |sin|-||*sin |-|
\ \2// \2/
--------------------------------------------------------------------------
4
$$\frac{- \sin{\left(\frac{x}{2} \right)} \left. \frac{d}{d \xi_{2}} \frac{\log{\left(2 \right)}}{\log{\left(\xi_{2} \right)}} \right|_{\substack{ \xi_{2}=\sin{\left(\frac{x}{2} \right)} }} + \frac{\left(1 + \frac{2}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}}\right) \log{\left(2 \right)} \cos^{2}{\left(\frac{x}{2} \right)}}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}^{2} \sin^{2}{\left(\frac{x}{2} \right)}}}{4}$$
/ / 2 \ 2/x\ / 2 \ 2/x\ / 2 \ \
| 3*|1 + -----------|*log(2) 2*cos |-|*|1 + -----------|*log(2) 2*cos |-|*|1 + -----------|*log(2) |
| 2/x\ | / /x\\| \2/ | / /x\\| \2/ | / /x\\| |
| 2*cos |-|*log(2) | log|sin|-||| | log|sin|-||| | log|sin|-||| |
| \2/ \ \ \2/// \ \ \2/// \ \ \2/// / d / log(2) \\| | /x\
-|-------------------- + -------------------------- + ---------------------------------- + ---------------------------------- + |-----|---------||| /x\|*cos|-|
| 4/ /x\\ 3/x\ 2/ /x\\ /x\ 3/ /x\\ 3/x\ 2/ /x\\ 3/x\ \dxi_2\log(xi_2)//|xi_2=sin|-|| \2/
|log |sin|-||*sin |-| log |sin|-||*sin|-| log |sin|-||*sin |-| log |sin|-||*sin |-| \2/|
\ \ \2// \2/ \ \2// \2/ \ \2// \2/ \ \2// \2/ /
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
8
$$- \frac{\left(\left. \frac{d}{d \xi_{2}} \frac{\log{\left(2 \right)}}{\log{\left(\xi_{2} \right)}} \right|_{\substack{ \xi_{2}=\sin{\left(\frac{x}{2} \right)} }} + \frac{3 \cdot \left(1 + \frac{2}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}}\right) \log{\left(2 \right)}}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}^{2} \sin{\left(\frac{x}{2} \right)}} + \frac{2 \cdot \left(1 + \frac{2}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}}\right) \log{\left(2 \right)} \cos^{2}{\left(\frac{x}{2} \right)}}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}^{2} \sin^{3}{\left(\frac{x}{2} \right)}} + \frac{2 \cdot \left(1 + \frac{2}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}}\right) \log{\left(2 \right)} \cos^{2}{\left(\frac{x}{2} \right)}}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}^{3} \sin^{3}{\left(\frac{x}{2} \right)}} + \frac{2 \log{\left(2 \right)} \cos^{2}{\left(\frac{x}{2} \right)}}{\log{\left(\sin{\left(\frac{x}{2} \right)} \right)}^{4} \sin^{3}{\left(\frac{x}{2} \right)}}\right) \cos{\left(\frac{x}{2} \right)}}{8}$$